Valve-tappet-silencing mechanism



V-. J. HARRIS. VALVE TAPPET SILENCING MECHANISM.

APPLICATION HLED JULY 12,1922.

1,42 5,766. t d Aug. 15, 1922.-

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VERNON J. HARRIS, or ADRIAN, MICHIGAN.

'vALvn-rAPrE'r'srLnncIne echanism;

memes.

Continuation of application Serial No. 439,159, filed January 22, 1921.

1922. Serial No. 574,350.

T all whom it mag concern:

Beit known that I, VERNON J. HARRIS, a

citizen of the United States, residing at,

Adrian, county of Lenawee, State of Michigan, have invented a certain new and useful Improvement in Valve-Tappet-Silencing Mechanism; and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and i use the same, reference being had tothe accompanying drawings, which form a part of this specification.

My invention relates to valve tappet silencers and reference is hereby made to my co-pending application Serial No. 99,159,- filed January 22, 1921. In the form of construction standardized in the Chevrolet motor thereis provided analigner or guide lock which connects. the adjacent ends of which the allgner is mounted. Furthermore, a slight oscillatory rotation of the plunger about its longitudinal aXis results from this wobbling action of the aligner. This tendency to oscillate increases with the wear of moving parts and produces inaccuracy in the valve timing in that the push rod plunger is not struck squarely each time by the revolving cam. I

My improved silencer is so formed as to be easily, quickly and releasably engaged with the valve push rod without anychange in the adjustment thereof or of its adjusting nuts so as to be carried by such push rod, and is adapted'to yieldingly engage the aligner or guide lock, exerting pressure thereon to prevent'rattling of the aligner against the adjacent rigid side of the engine casing or within the provided grooves in which the aligner is mounted. when in position also serves to maintain ,ger above such nut.

retaining grooves formed in the push rod sections in This silencer This application filed. July 12,

squarely by the revolving cam. Tn the drawings,' Figure 1 is an .end'view of an internal combustion engine partly broken away to show the. operationof the valve pushrod.

' Fig. 2 is a section taken'online2-f2 of Fig. 1.

Specification of Le tt rs Patent. Patented Aug. 15 1922.

i the plunger and ushrod alignment so that the end. of t e plungerwill be struck Fig-3 is a section takenion line-3 3 of I Fig. -1.. I Y Fig. i is a front elevation of'my device. Fig. 5 is a side'elevation of.. 1ny device."

Let a indicate thelengine ca'slng and b'the I cam shaft providedwith the cam 0; The

push rod is indicated as d and its lower section or what is more commonly termed the V plunger, as 6. Threaded' on the lower end of the pushrod isa-nut or collar 7 which contacts with the adj acent end of the plun ger and by virtue of the adjustment ofwhich on the push rod the ulated. This nut 7 is .adjustably locked by length of the rod'is'r'egmeans of a lock nut g threadedonthe plun To fasten the .plunger'e push rod f, to-

"gether, to reciprocate as one-piece, thereis' provlded a pressed metal guide lock or aligner it turned inwardly on opposite sides forming wings whichseat in vertically-disposed registering-slots formed in-the' nutr and the plunger 6, one on each side thereof, and by virtue of they lateral extensionfof suchsidewings rotation of the plunger and push. rod relative the engine casing, ls

limited} x I ltisapparent that there is clearance tetween the aligner and engine casing and that thisolearancewlll permit a limited oscillatory rotat1on'ofthe1al1gner causing it to strike the engine casing. wall, and this noise would increase. 1n direct proportion to.

the increase an'dpermitted play due to wear of the moving parts t Thejlower end of the pl-unger'is beveled to. a diameter which should-be struck square- 1 by the revolving cam a ndthis permitted rotatable oscillation of the plunger causes the cam ,to strike the plunger unevenly. This action also increases with the wear of the moving parts and in time the lower end of the plunger is so worn asto prevent accurate operation of the timing mechanism. The above construction is standard on the Chevrolet engine.

My silencer comprises a resilient spring member 2' having a body portion 2 so formed as to be releasably sprung about the push rod and yieidingly, grippingly, straddling said push rod to be carried thereby. This body portion is provided with a pair of spaced-apart downwardly-extending prongs or iorks,,curved or undulated as shown in Fig. 5, one on each side of the plunger and extending longitudinally thereof and interposed between the aligner and the engine casing. These prongs exert yielding are sure on said aligner and engine casing and prevent rattling of the aligner against the casing. It also maintains the plunger in alignment with the push rod and prevents relative rotation thereof about its vertical axis. I

It will be seen that this silencer maybe easily and quickly attached to the push rod without unscrewing the adjusting nuts and otherwise interfering with the "timing adjustment of the valve operating mechanism suchas would be the case were the silencer held between the lock nut and adjusting nut on the push rod.

"What I claim is:

1. In a device of the class describechin combination, a valve push rod, the co-operating cam actuated plunger, a guide lock connecting said plunger andpush rod together, a spring guide member shaped so as to partially encircle the push rod resiliently gripping the same so as to be carried thereby, such spring guide member provided with a pair of downwardly extending prongs the plunger, lock member interposed between the guide and the engine casing, said prongs so shaped as toexert yielding pressure on said ulde lock to prevent its strlking against the engine casing.

2. In a device of the class described, in combination, a valve push rod, a co-operating plunger, said push rod and plunger each provided with longitudinal extendingreg' istering slots, a guide lock adapted to be received in said slots connecting'said push rod and plunger together, a guide spring shaped so as to be sprung about such push rod gripping the same in such a manner as .to be carried thereby, saidspring providedwith a pair of prongs extending downwardly one on each side of the push rod interposed between the guide lock and engine casing each. of said prongscurved so as to hold the guide lock outwardly from said engine casing and adapted to maintain the alignment of said push rod and plunger.

In device of the class described, in combination, a valve push rod, 9. co-operating cam actuated plunger, a guide lock conmeans connecting ositioned one? on each side of 'thcreb necting said plunger and push rod, a guide spring pro vided with a body portlon adapted to resiliently grip the push rod to be carried thereby and provided with a pair of extensions disposed on opposite sides of the push'rod extending longitudinally thereof shaped so as to exert pressure on said guide lock in such. a manner as to prevent its rotation relative the axis of the push rod.

i. In a device of the class describechin combination, a valve push rod, a co-operating cam actuated plunger, a rotating cam, said plunger and push rod, a spring guide member adapted to exert yielding pressure on said connecting means so as to thereby hold the face of the said plunger in alignment with the cam, said spring guide provided with a body portion shaped so as to grip the push rod in 'such a manner as to be carried thereby, being held thereon by virtue of the spring pressure in said body portion;

5. The combination with an engine casing, a valve push rod, an actuating mem her and a guide lock connecting the proximate ends of said push rod and actuating member together, of a device of the class, described, comprising resilient undulated guide lock en aging prongs disposed between said guide lock and said engine casing, and connected by a body portion adapted to be engaged with the push rod.

6. The combination with an engine casing, a valve push rod, a plunger adapted to ac tuate said push rod and a guide lock adapted to hold the proximate ends of said plunand push rod together, of a silencer com prising a body portion adapted to be en with the push rod so as to b e'carried said body portion provided with resilient undulated guide lock engaging portions adapted to be interposed between the guide lock and enginecasing and extending substantially longitudinally the push rodon opposite sides thereof and adapted by virtue of their undulated construction to exert spring pressureon said guide lock.

7. The combination. with a valve push rod,

an actuating n'iember and a guide lock connecting said push rod and actuating member together, of a silencer shaped to resiliently embrace said push rod to be carried thereby and adapted to exert yielding pressure on said guide lock to prevent its rotation.

8, lhe combination with. an engine casing, a valve push rod, an actuating member and a guide lock engaging adjacent ends of said push rod and actuating member together of a silencer havinga body portion shaped so as to resiliently embrace said push rod in such a manner as to be carried thereby and adapted to frictionally engage said engine casingand exert oiitward yielding pressure on said guide lock. i

9. The combination with an engine casing, a valve push rod, an actuating member and a guide lock connecting adjacent ends or" said push rod and actuating member together of a spring guide member shaped so as to resiliently embrace said push rod so as to be carried thereby and provided with guide lock engaging portions adapted to slidably ing and exerting yielding outward pressure on said coupling member.

In testimony whereof, I signthis'specification.

VERNON an mals,

frictionally engage said engine cas- 

